Flash-back-stop tester.



D. O'KBEPE.

FLASH BACK STOP TESTER.

APPLICATION FILED JAN.14, 1907.

Patented Jan.25, 1910.

UNrrE srarns ca rnnr or rroa.

DANIEL QKEEFIE, OF CINCINNATI, OHIO, ASSIGNOR, ,IBYJVIESNE ASSIGNMENTS ED EDl/VIN MoFARLAND.

FLASHBACK-STOP TESTER.

Specification of Letters Patent.

Patented Jar-n25, 19.10.

Application filed January 14, ,1907. Serial No. 852,217.

My invention relates to means for testing devices adapted "to prevent the flame from flashing back from the point of normal combustion'through the supply passage to the container. Such a device for arresting the i flashback is described in my Letters Patent'of the United States, No. 879,57 7 dated Feb. '18, 1908.

All flashback stops should be testcd'in the shop'before being sent out for use and this is-the use for which my device is particularly intended; but it may become desirable to test such stop devices on the line, and with my testing device this can readily be done, the supply ine being provided with suitable'openings and cocks.

My invention is illustrated in the accompanying drawings, in whichi Figure 1 is a side elevation of my testing device and the attached flashback stop, mostly in vertical axial section. Fig. 9 is a top plan view of the same. Fig. 3 is a detail of the weighted bellows gas holder. Fig. A is a detail of the liquld seal gas holder. Fi 5 is an 'end elevation of the tester and the outlet end of the stop in position for test.

into the waste flue C, hereinafter described.

An agitator a of any suitable kind is journaled in the ends of the tank a, and is adapted to be rotated or oscillated by the handle a, or in any other suitable-manner. A petcock a is adapted to maintain the proper water lever in the tank. A drainage plug a is threaded into the bottom of the tank.

A gas outlet pipe a provided with a cock at connects the generator A with a pipe B which terminates at one end in a connection adapted to engage the inlet end of the flashback stop S to be tested, while'the other end of'said pipe 13 is fitted with a cap '6 Tapped into a convenient point of the pipe B is a safety valve b of any suitable type adapted to discharge gas into a waste flue C or its connectionwhenever the pressure of gas exceeds a predeterminedlimit.

Connected with the pipe B at anydesired point and in any convenient mannerfas by 'a 6-way cross b are provided one or .more receptacles for a limited quantity of gas. In the drawing, three are shownythe middle one a collapsible gas bag'D connected to one opening of the-cross b; another E an accor- (llOll bellows construction adapted to be placed vertically as shown in Fig. 3 with-top weight 0, is connected to atee and pipe threaded into the cross I) ,'-wlii1e thethird is a liquid seal holder F, of any ordinary*type, connected to a tee and pipe threaded into the cross I). The container '1) is surrounded by a wire net D, or other suitable protection, and its supply is controlled by the cock d. The container E is provided at its inlet end with a cock 6 to controlthe supply of gas and at some convenient point with a cocr e to release excess gas into the waste flue. Container F is provided on its inlet pipe 7' with a cock f to control the supply of gas, and avent cock f at the top of the inverted bellj which is partially immersed in liquid contained in the vessel 7". The height of liquid in said vessel is controlled by the overflow'and draw-ofi' with its 3 way cock f.' The inlet pipe 7' terminates above the water line, to convey gas to'the interior of the bell.

At each end of the cross connection formed by the cross If and itsattached pipe and tees is a valve b with provision for suitable connection to a flexible or other pipe, through which air or a foreign gas may be introduced.

A hood C tightly incloses all the gas receptacles, connects with the waste flue {(1, and isprovided with doors 0 adapted to hermetically seal the hood when closed, and when open to afford free access to'the containers.

At a convenient point on the pipe B is a cock I). Tapped into the same pipe is a pipe G for supplying air or elementary gases controlled by the valve g. Also tapped into the same pipe on the top side thereof is receptacle H for highly volatile'gas producing K with connections adapted to engage the outlet of the flash-back stop.

Adjacent to the connection there is tapped into the upper side of said pipe a gage L similar to the one I, and provided with valve Z. v

At the outer end of. the pipe K is a slide stop is of the ordinary type, adapted to be operated by lateral motion of the handle 74, so that a full discharge of gas through the pipe K will be instantly secured.

Tapped into the pipe B is a service gas line M, controlled near said. connection by ting in a convenient supply of water. .move the cap and place carbid 1n the recepa cock m. Its outer end terminates directly in front of the outlet end of the pipe K in a jet m controlled by a cock m 7 The 0 eration of my invention is as follows: If carbid gas is to be made on the spot and supplied, close the cocks a, a and a and the valve a Open the valve a ipt- .ftaclea, and replace cap. Open the valve 66* "to pfernnt a suitable quantity of carbid to through device to the gas container.

drop down into the water in the tank a. Close the cocks b and m, open the cock a, and as many as desired of the cocks (Z, 6 or f,'let us assume but one, and that 6 and close the cock Grasp-the handle a and agitate the carbid and Water mixture until a suitable charge of gas has been formed and conveyed to the containerE. Close the cock and open a. Close stop is. Open stop m, allowing gas to flow'through pipe M. Open cock at and apply flame to jet m Set the three way cocks N, N of the flashback stop mechanism S inch is open as shown in Fig. 1, so that passage is 6pm en the valve g admitting air to the pipe B zi nd the stop device and pipe K, open the cock 6 and allow the gas to flow in until both gages I and L register the desired pressure, then close the cocks z and Z of said gages. Then open the stop 70 and themixture of air and senses gas flowing from outlet of pipe K Will come in contact with the flame from jet mt, will ignite, flashback :ough pipe K, discharge the fulminate or alosive in the flashback stop S, and i the stop is in proper working order, it will seal the supply passage against the flashing back of the flame to the container. If it fails to Work properly the flame will flashback to the container E and burst it, the gas and fumes escaping into the hood C and waste flue O. As the amount of gas in the container is small, no damage to property or injury to persons can occur.

If a foreign gas is used, the cock (i is. closed, the generator A is not used, connection is made at b for the introduction of the gas supply, which is shut off after the container is filled and the operation is otherwise the same.

If the is formed within the device from a liquid; cock 6 is closed, gasolene or other volatile combustible fluid placed in cup it, fed into reservoir it through valve 7L1, and through valve it into pipe B forming ,an explosive or combustible mixture when air or elementary gases are admitted and the operation is then the same, valve ifi'bctng closed to prevent flashing back into the reservoir 7L2.

Any means of supplying a limited quantity of gas to the stop being tested and of supplying the airor mixture and applying the flame, is Within the scope of my lnvention.

I claim as my invention and desire to secure by Letters Patent-of the United, States.

In an apparatus for testing flash-backstops, a gas supply pipe provided with means for attaching the inlet end of the flash-back stop; a flame producer adapted to operate approximate to the exit mouth of the flash-back stop; an expansible gas container of limited capacity interposed in the line as a secondary source of gas trans-' mission between the source of supply and the flash-back stop connection, and means for closing the connection between the main and the auxiliary sources of supply.

In testimony whereof I have hereunto set my hand in pre ence of subscribing Wit-- nesses.

DANIEL OKEEFE \Vitnesses:

T1103. J. BELL, IIABRY CURRIE SMITH, EDWIN MCFARLAND. 

